Improvement in nut-locks



`J.T.1 A12Ks.

NUT-LOCK.

Patented Feb.1, 1876.

UNITED STATES PATENT OFFICE `JOIED T. PARKS, OF EFFINGHAM, ILLINOIS.

IMPROVEMENT IN NUT-LOCKS.

Specification forming part of Letters Patent No. 172,824, dated February 1, 1876; application filed September I, 1875.

i To all whom it may concern:

Be it known that I, JOHN 'L PARKS, of Efngham,in the county of Eliingham and State oi Illinois,'have invented a new and useful Improvement in N ut-Locks; and I do hereby declare the following to be a ful1,clear, and exact description of the same, reference being had to the accompanying drawings forming part of this specification, in which the figure represents a perspective view of myinvention.

My invention has for its object to provide a cheap, simple, and effective device for securing nuts to bolts, and is designed more particularly for use on fish-plate joints for rail-4 roadlrails,'although it is generally applicableV to all kinds of machinery. It consists in cerr tain improved details of construction, which I will now proceed to describe, and point out in the claims.

In the drawings, A represents the fish-plate, and C C D D the nuts and bolts, respectively, all of the usual construction. P represents a plate of metal, preferably ofband or hoop iron,

provided with orifices near its extremities which allow it lto be fitted over the central bolts D', an( yhaving beveled ends e, as shown.

O is a spring-plate of thin metal pivoted to the plate P at p, adapted. to'lock the central nuts C G, and having its ends beveled in the same manner as those of the plate P.

In applying my invention the central nuts C G' of the fish-plate are removed and the plate P fitted over the bolts, its ends abutting against the face of the end nuts C, and thus sethey are held by the beveled portion, as will be readily understood.

To guard against casual displacement of the spring-plate O, I turn up the edges of the plate P to form ears t t, which embrace the edges of the said plate O and prevent its turning.

When it is desired to remove the lock from the nuts the plate O is sprung up by hand far enough to'clear the ears t t, and the operation above described is reversed.

I claim as my invention- Y l. The plates Pv O, provided with beveled ends e e, combined with the bolts and nuts (ll C D D', substantially as described.

2. The spring-plate O, pivoted'at the center,vin combination with the thin metal plate P, adapted to have, its edges turned over atA tt to keep the spring-plate imposition, and yet allow it to be sprung out by hand, so as to 'clear both the turned edges t t and the nuts JOHN T. PARKS. Witnesses:

A. S. MOFFITT, J. C. BRADY. 

